Many different shapes are possible with just one mould – notwithstanding easy handling and short changeover times. The easiest way to produce a 3D room element is to use a fixed inner core with a slope. However, this approach is only suitable to elements in which the formation of a wall slope in the element is possible within the scope of the standards and static requirements. Such is the case for the design of garages or the production of transformer stations. For the production of substation elements in particular, we developed a solution that covers common types of stations, is flexible to use, and which can speed up the process in the plant.